MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure durability and longevity. Operating temperature ranges from -65°C to 200°C, making them suitable for a wide range of applications.